B K/mueller Inds(import) 521-202HN Black Coupling 3/8 in

Product Description

The B K/MUELLER INDS(IMPORT) 521-202HN is a 3/8-inch black right-hand coupling designed for threaded pipe connections in residential and light commercial plumbing and gas piping systems. This fitting features right-hand threading, the standard thread orientation used across the vast majority of pipe installations. Finished in black, this coupling is commonly associated with black iron pipe systems used in gas distribution and similar applications. Each package contains 10 couplings, making it practical for jobs requiring multiple fittings. Licensed plumbers and pipefitters are the primary installers of this type of fitting.

This coupling is suited for 3/8-inch threaded pipe applications in residential and light commercial settings. Typical uses include gas supply lines, general plumbing rough-in, and industrial piping where black iron fittings are specified. The 10-unit package quantity supports both single-fixture repairs and multi-outlet rough-in work. Verify thread size and pipe schedule compatibility before installation to ensure a proper fit and leak-free connection.

Key Features

• 3/8-inch right-hand threaded coupling for standard pipe connections
• Black finish consistent with black iron pipe system aesthetics and application requirements
• Sold in a 10-unit package for efficient job-site use
• Compact and lightweight at 1.22 pounds per package of 10

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 3/8-inch right-hand threaded pipe systems. No specific compatible model numbers or system families were identified in the product data.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local codes, the International Plumbing Code (IPC), or the International Fuel Gas Code (IFGC) where gas service is involved. Shut off the gas supply or water supply at the main valve before beginning work. Apply an appropriate thread sealant or PTFE tape to male threads before assembly. Do not overtighten threaded fittings, as this can crack or deform the fitting body.